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Subzero temperatures a challenge for airports

Across Wisconsin this week, from small airports to Mitchell International in Milwaukee, there are folks on the ground working outside and freezing so travelers can take to the sky and reach their destinations with barely a shiver. Commercial aviation doesn’t come to a halt just because it’s cold outside. “It doesn’t stop anything, really,” said Jeff Baum, CEO of Wisconsin Aviation, based in Watertown. “Operationally, everything takes much longer and costs more to prepare an airplane for a flight or to run an airport.”